Vacuum-cooler with interior absorption.



Patented Nov. 19, 1918.

P.scHou.v VACUUM COOLER WI'IH INTERIOR ABSORPTION.

lAPPLICATION FILED MAR. I5. 1918.

ernten,

PAUL SCHOU, OF COPENHAGEN, DENMARK.

VACUUM-COOLER WITH INTERIOR ABSORPTION.

Speoioation of Letters Patent. Patented Nov, i9, 1918.

Application ed March 16, 1918.V Serial No. 222,904.

. To all whom it may concern:

Be it known that I, PAUL SCHOU, of Copenhagen, in the Kingdom of Denmark, have invented certain new and useful improvements in Vacuum-Coolers with Interior Absorption, of which the following is a full, clear, and eXact description.

The present invention refers to that kind of apparatus for household and other u se 1n which cooling or freezing is accomplished by means of evaporation in vacuum by absorption of the vapors.

The principal feature of the invention consists in that the space or spaces in which the absorption of the vapors takes place and the space or spaces intended for cooling or freezing are immediately adjacent to one another in a common retainer and'communicate with each other through openings located at different levels.

This affords not only. the advantage that, instead of two retainers independentl of'each other (a freezing-tank by itself and an absorption tank by itself) there is only one single compendious retainer, but also the advantage that the course of the vapors from the place of evaporation to the place of ab'- `sorption is comparatively very short, thus accelerating the absorption.

rlhe invention is advantageously carried out by arranging flat absorption-chambers disposed in stories, the one above the other, at the side or sides ofthe freezing-chamber `or outside or inside it, so that there is direct access to an absorbing surface 1n several superadjacent places in the freezing-chamber. Such a vacuum cooler may be made of ceramic material, for instance, china, and the story-like superadjacent elements that form the absorption-chambers may be fused together into a unit and also be united with adjacent parts of the walls of the freezingchamber, so that the said vacuum-cooler with interior absorption, after being fused together, forms one single, air-tight, unit.

The drawing shows, by way of example, one form of construction in vertical section.

The story-like, superadjacent, grooveshaped elements 1, which form the absorption-chambers 2, are ring-shaped and have, on their upper edges, recesses or hollows 3, through which the absorption-spaces communicate with the freezing-chamber i surrounded by the elements. Every element has an overflow 5 whose upper edge lies at a distance above the bottom of the groove corresponding to the desired layer-thickness of the absorption-means, and whose lower edge is situated at about the same disance from the bottom of the subjacent element. ln the section drawing these overflow pipes` are only visible where they belong to the elements with odd numbers, z'. e., the first, third, fth element, etc. rThe overflow-pipes of the elements with even numbers lie behind the section-plane. Furthermore there may be other passages 6 in the elements which are not accessible for the means of absorption, but through which the absorption chambers are in direct mutual connection.

The pile of elements standsfon a bottom Z with a ring-shaped groove 8 for the waste absorption-means, which can be tapped off through the cock 9, 10 indicated by dotted lines. On the top of the pile is placed a collar 11 with a groundbearing-surface for a lid'l2 with plug 13.v 0n the outside of this collar there are disposed (as shown by the dotted lines), firstly, alling-socket .14E (with plug l5) through which fresh absorbingmeans may be poured down into the uppermost element, secondly a socket- 16 which communicates with an inner opening i7, and to which a vacuum pump or vacuum-pipe can be connected, so that the freezing-cham.- ber can thereby be exhausted. l

The elements '1, the bottom 7, the collar 11, etc. may, as has already been said, be made of ceramic material. When these dierent parts are put together in the manner indicated above and fused together, there will be produced a homogeneous, strong, unitary, hollow body, which is air-tight and acidproof.

When the absorption-means has been poured in, and water introduced into the chamber 4, and the latter has then been closed by the lid 12 and exhausted, the water will evaporate and, owing to the loss of heat caused by the evaporation, will soon freeze. After the vacuum has once been produced, it does not need to be kept up by continued pumping, since the vigorous absorption of the vapors in the absorption-chambers with their great absorbing-surfaces closely surrounding the freezing-chamber on all sides, prevents detrimental rises of pressure. The heat which the water loses by evaporation is taken up by the absorbing-means, which in some cases is heated still more by reaction on thewater. In order to prevent the elements 1 from being thereby so heated that. the cooling-effect in the. chamber i is` de.

means constantly receives cold from the vacuun'i-cooler. For this purpose a pipe 2O may be introduced With air-tight joints through 'the holes. 19' in the bottom 7, said pipe 20 communicating with said hollow walls or the like. As the cooling-means here present is heated, it rises in the.V pipe 20, Where it is cooled, so that. it flows back in a cold state.

I claim:

l. A cooling apparatus comprising an evaporation chamber and an absorption chamber located side by side and connnunieating with each other through openings located at different levels.

2. A coo-ling apparatus comprising a separating Wall'V provided with openings at dierent levels, an absorption chamber located on one side ofl said wall, and an evaporation chamber located on the other side of said wall, and communicating With the rst-named chamber through said openings.

3L A cooling apparatus comprising a series of superposed annular members formed with channelsto retain an absorption medium and with connecting ducts, and a central chamber surrounded by said members Lesa-L15 and communicating with the spaces above said channels.

4., A cooling apparatus comprising a series of superposed annular members provided at their inner portions, with openings leading to the central chamber surrounded by said members, each member having a. channel for the reception of an absorption Inef dium, opento said central chamber through said openings.

5. A cooling apparatus comprising'a series of superposed annular members surrounding a'central evaporation chamber, each member having a channel for the reception of an absorption medium, and openings leading to the central chamber above the liquidy levels of the respective channels.

G. A cooling apparatus comprising a series of superposed annular members surrounding a central evaporation chamber, each member having a channel for the reception of an absorption medium, an overflow tothe next channel below, and openings leadinoto the central chamber above the over ow levels of the respective channels.

7. A cooling apparatus comprising a series of superposed members surrounding aV central evaporation chamber, each member having a channel for the reception of an absorption medium, and openings leading to the central chamber above the liquid levels of the respective channels, and a cooling jacket surrounding said annular members.

In testimony that I claim the foregoing as my invention l have signed my namein presence of two subscribing witnesses.

PAUL sonori.A

Witnesses:

ERNEST BouTARD, N. BUSCH-JENSEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

